The NYPD nabbed more than 150 johns in a citywide sting targeting people paying for prostitutes, police said.

The three day “Losing Proposition” initiative took place between May 30 and June 1, during which time cops arrested 156 people for patronizing a prostitute and seized 32 vehicles in addition to making nine other arrests for various offenses, police said.

“The department is focusing on the demand side of the equation. The exploitation of women is not a victimless crime,” top cop Ray Kelly said.

Since 2011, “Losing Proposition” initiative has resulted in more than 900 arrests for people patronizing prostitutes and cops have seized more than 220 vehicles.

In addition to expanding this initiative, Kelly has added a Human Trafficking Squad to “identify and arrest individuals engaged in wholesale trafficking of human beings for the purpose of prostitution.”

Last month cops busted a 35-year-old Harlem man for sex trafficking and promoting prostitution, police said. He was keeping three women, one a missing 17-year-old from Connecticut, in an East Harlem housing project.

Those arrested for paying adult prostitutes for sex face up to one year in jail, while promoters of prostitution, face up to 25 years behind bars, according to the NYPD.